I have a 2000 DeVille , i definitely put my oil cap on properly , when i went to start the car the oil cap poped off so forcefully that it flew over my house and landed on the street
Can you do that a second time? And do you have a question?
That’s quite a distance!!!
Replace the PCV valve.
Pull the oil dip stick and smell if there’s gas mixed with the oil.
Or organize an oil cap blowing contest with other DeVille owners in your area! Great fun!
Prizes for distance and accuracy!!
Me thinks that this could be a Myth Busters episode .